Apparatus for printing wall board



July 2, 1929. J, sc uMAc R' 1.719.199

APPARATUS FOR PRINTING WALL BOARD Original Filed Oct. 12 1925 2 Sheets-Sheet 1 BY WWMWLZZLQ A TTORNEYS.

y 1929. J. SCHUMACHER APPQRATUS FOR PRINTING WALL BOARD Original Filed Oct. 12, 1925 2 Sheets-Sheet 2 INVENTOR. Jo/m Scfiumacfier BY WMZ/M A TTORNEYS.

Patented July 2,1929:

UNITED STATES PATENT OFFICE.

JOHN SCEUMEACHER, OF LOS ANGELES, CALIFORNIA.

APPARATUS son rnmrme WALL BOARD.

Application filed October 12, 1925, Serial No. 61,980. Renewed May 1, 1929.

This invention relates to means for imprinting the surface of plaster board with display matter during the formation of the board. It is often found desirable to mark and ornament the cover sheets of plaster board. Using the continuous process of manufacture, wherein cover sheets are continuously advanced and a plastic composition interposed therebetween, it is found convenient and economical to imprint the sheets with the display matter during the advance of the sheets. Uniformity of marking or imprinting is thus obtained and no additionalhandling of the board is required. A minimum of handling operations is a desideratum in the manufacture of plaster board. The

present invention. has for its primary purpose the provision of an instrumentality to accomplish the above mentioned objects.

These objects together with other objects and corresponding accomplishments are obtained .by means of the embodiment of my invention illustrated in the accompanying drawing, in which:

Fig. 1 is a side elevation of the head end of a plaster forming machine; Fig. 2 is an ele-" vation on an enlarged scale of a portion of the machine showing the marking cylinder; Fig. 2 is a vertical sect-ion showing a fragment of the marking mechanism; Fig. 3 is a section'as seen on the line 3-3 of Fig. 2; Fig. 4 is a plan view as seen looking in the direc' tion of the arrows 44 of Fig. 2 and'Fig. 5 is a perspective view showing a panel of plaster board in itsfinal marked condition.

Referring more particularly to the drawing, a plasterboard forming machine of sub-j stantially the same broad character as is now well known in the art is disclosed. This machine comprises along frame A, upon which is mounted an endless conveyor belt B, the upper lead of which forms the bed upon which the board is formed. Y A hopper C provided with a suitable chute is designed to supply plaster to the lower cover sheet of the plaster board being formed. The plaster isl directed into a bottomless box D and under which travels the lower cover sheet supplied from a roll E suitably journalled in a sub-' sheets are marked as they pass from the supply rolls to the board forming mechanism.

.The marking mechanisms are indicated by G .roller 13 is journalled' The web of paper to provide the upper cover sheet passes from the supply roll F over the platen roller 13 and about the pressure roller 14. In its travel, a suitably inked printing roller 15 having the designs to be marked upon the paper en graved thereon rolls against the surface of the latter. The roller 15 is journalled in the s1de.plates 16 slidably mounted upon rails 11. Extending between the plates is an ink trough 17, from which ink is delivered by a roller 18 journalled in the side plates 16. Distributing rollers 19 'and'20 transfer the ink from roller 18 to theprinting roller 15. In order that there may be an adjustment of the contact of the printing roller against the paper, side plates 16 are slidably mounted upon rails 11 and are held in position by adjustmentmembers comprising threaded stems 21 mounted in bearing nuts 22 secured to the rails. At the ends of the stems 21 are hand .wheels 23 for turning the stems. On the end of each stem 21 is a head 24 supporting a compression spring 25 which forms a resilient connection between the stem and the side plate. By properly adjusting the side plates thro'ugh turnlng the hand wheels, the pressure of the printing roller may be adjusted. The lowersheet of paper is marked by similar mechanism indicated by H.

Although I have shown herein a mechaforming mechanism, the combination of a cover sheet supply roll, a platen and guide roller about whic the web of said sheet is passed in its advance to the board forming mechanism, a printing roller opposed to said platen roller for marking the cover sheet -with display matter during its travel and means to continuously pull upon said web so as to unwrap and withdraw the sheet from said roll and advance the latter. A

2. A device of the class described comprising the combination of a cover sheet supply roll,a platen and guide roller about which the web of said sheet is passed in its travel, anla'djustable printing roller opposed to said platen roller for marking the cover sheet with display matter,i and means to contin- 'uously pull upon said web so as to withdraw the sheet from said roll and advance the latter.

v I 3.- In a wall board machine having board iorming mechanism, the combination of a cover sheet supply roll, a platen and guide roller about which one of said sheets is passed, a printin roller opposedto'said platen roller for marking a sheet with display matter during its travel, said printing roller being adjustable, distributing rollers for supplying ink to said printing roller, and means to continuously pull upon said web so as to unwrap and withdraw the sheet from said roll and advance the later, said means beingincluded in said board forming mechanism.

In witness that I claim the foregoirfg I have hereunto subscribed my name this 28th day of September, 1925.

' JOHN SCHUMACHER. 

